National Instruments SCC-FV01 User Manual
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National Instruments SCC-FV01 User Manual

National Instruments SCC-FV01 User Manual

Frequency input module
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USER GUIDE
SCC-FV01 Frequency Input
Module
Conventions
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»
bold
The SCC-FV01 frequency input module is a frequency-to-voltage
converter designed to measure signals from frequency-generating sensors
and other periodic signal sources. The DC output voltage of the module is
proportional to the input frequency.
The following conventions are used in this guide:
Angle brackets that contain numbers separated by an ellipsis represent a
range of values associated with a bit or signal name—for example,
P1.<3..0>.
The » symbol leads you through nested menu items and dialog box options
to a final action. The sequence File»Page Setup»Options directs you to
pull down the File menu, select the Page Setup item, and select Options
from the last dialog box.
This icon denotes a note, which alerts you to important information.
This icon denotes a caution, which advises you of precautions to take to
avoid injury, data loss, or a system crash. When this symbol is marked on
the product, refer to the Read Me First: Safety and Radio-Frequency
Interference document, shipped with the product, for precautions to take.
When symbol is marked on a product, it denotes a warning advising you to
take precautions to avoid electrical shock.
When symbol is marked on a product, it denotes a component that may be
hot. Touching this component may result in bodily injury.
Bold text denotes items that you must select in software, such as menu
items and dialog box options. Bold text also denotes parameter names.

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Summary of Contents for National Instruments SCC-FV01

  • Page 1 USER GUIDE SCC-FV01 Frequency Input Module The SCC-FV01 frequency input module is a frequency-to-voltage converter designed to measure signals from frequency-generating sensors and other periodic signal sources. The DC output voltage of the module is proportional to the input frequency.

  • Page 2: What You Need To Get Started

    SC-2345 refers to both the SC-2345 connector block and the SC-2345 configurable connector. SCC refers to any SCC Series signal conditioning module. What You Need to Get Started To set up and use the SCC-FV01, you need the following items: ❑ SC-2345/2350 with one of the following: –...

  • Page 3: Device Specific Information

    Connecting the Input Signals section. Note If you use the SCC-FV01 in a dual-stage configuration, you must use it as the second stage. Plug the first-stage module into any socket J(X+9) and plug the SCC-FV01 into socket J(X+1), where X is 0 to 7.
  • Page 4 Calibrating Offset Errors The SCC-FV01 module is calibrated at the factory before shipment. If you want to adjust for any errors in your system, you need a function generator and an oscilloscope capable of measuring the frequency you are applying.

  • Page 5: Specifications

    Output offset .......... 5 mV max Output offset temperature coefficient ..10 ppm/°C Gain error ..........±0.1% max Gain error temperature coefficient ..100 ppm/°C Nonlinearity ........... 0.015% full-scale Recommended; minimum ±100 mV. © National Instruments Corporation SCC-FV01 Frequency Input Module User Guide...

  • Page 6: Power Requirements

    (detachable) Wire gauge range........28 to 16 AWG Maximum Working Voltage Maximum working voltage refers to the signal voltage plus the common-mode voltage. Channel-to-earth ........±10 V, Installation Category I Channel-to-channel.........±10 V, Installation Category I SCC-FV01 Frequency Input Module User Guide ni.com...

  • Page 7: Electromagnetic Compatibility

    Humidity ..........10 to 90% RH, noncondensing Maximum altitude ........2,000 meters Pollution Degree (indoor use only) ..2 Safety The SCC-FV01 meets the requirements of the following standards for safety and electrical equipment for measurement, control, and laboratory use: •...
  • Page 8 PWB Key Pin 19 5 Pin 20 Figure 1. SCC Module Bottom View Table 1 lists the signal corresponding to each pin. Table 1. SCC-FV01 Pin Signal Assignments Pin Number Signal E Series AI (X) E Series AI GND —...
  • Page 9 Table 1. SCC-FV01 Pin Signal Assignments (Continued) Pin Number Signal — — A GND REF 5 V +15 V –15 V — — AI (X)–(from first stage) AI (X+8)+(from first stage) AI (X)+(from first stage) AI (X+8)–(from first stage) AI (X) and AI (X+8) are the analog input signal channels of the E Series DAQ device.

  • Page 10: Theory Of Operation

    Stage Stage Figure 2. SCC-FV01 Signal Connections The SCC-FV01 has two input channels designed to measure 0 to 100 Hz signals. The output voltage (0 to 10 VDC) varies linearly with respect to the input frequency. The frequency-to-voltage and analog circuitry for each channel consists of a triggering stage, a frequency-to-voltage stage, and an output stage.
  • Page 11 The threshold for the SCC-FV01 is fixed at 0 V and the hysteresis is fixed at 200 mV. This means the amplitude of the input signal must be at least ±100 mV...

  • Page 12: Output Stage

    *371069B-01* Corporation. Product and company names mentioned herein are trademarks or trade names of their respective companies. For patents covering National Instruments products, refer to the appropriate location: Help»Patents in your software, the patents.txt file on your CD, or ni.com/patents.

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